[dm-crypt] Are /dev objects required for clean shutdown?

Pascal Pascal at rkfd.com
Tue Feb 6 16:48:06 CET 2018


/dev on my CentOS 7 box took a 'rm -rf' yesterday, wiping out most of 
it.  Easiest way to recover is to reboot (/dev is on a ramdrive and 
created from scratch during boot), but I'm worried about not getting a 
clean shutdown.  Does cryptsetup need anything in /dev to shutdown 
cleanly?  If so, how do I recreate the devices?  The complete list of 
what is missing from /dev is huge, but the below all seem to be disk 
related and are all gone now:

/dev/dm-0
/dev/dm-1
/dev/dm-2
/dev/sdb
/dev/sdc
/dev/sdd
/dev/sg0
/dev/sg1
/dev/sg2
/dev/mapper/luks-27bc6c3f-3479-4c65-b2f8-17d35081bbf4
/dev/mapper/luks-2f41b83f-925d-42f0-aca2-b91b1c6265b0
/dev/mapper/luks-68f22741-5399-41e5-b40b-81230cb51b27


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